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From: Dimitri Sivanich <sivanich@sgi.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] specific do_timer_cpu value for nohz off mode
Date: Fri, 2 Dec 2011 14:22:54 -0600	[thread overview]
Message-ID: <20111202202254.GG2164@sgi.com> (raw)
In-Reply-To: <20111202201452.GF2164@sgi.com>

On Fri, Dec 02, 2011 at 02:14:52PM -0600, Dimitri Sivanich wrote:
> So at that time, we could be off +- almost a tick.  The question is, how
> critical is that?  When you down a cpu, the same sort of thing could 
> happen via tick_handover_do_timer(), which itself does nothing more than
> change tick_do_timer_cpu.

I should clarify that by 'same sort of thing' I mean that the target cpu
might've just gone through tick_periodic(), so we could miss a tick before
the next update.

  reply	other threads:[~2011-12-02 20:22 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-11-08 19:11 [PATCH] specific do_timer_cpu value for nohz off mode Dimitri Sivanich
2011-11-23  0:08 ` Andrew Morton
2011-11-30 15:29   ` Dimitri Sivanich
2011-12-01  0:11     ` Andrew Morton
2011-12-01  0:16       ` Andrew Morton
2011-12-01  2:07         ` Dimitri Sivanich
2011-12-01  2:13           ` Andrew Morton
2011-12-01 16:37             ` Dimitri Sivanich
2011-12-01 22:56               ` Andrew Morton
2011-12-02 20:14                 ` Dimitri Sivanich
2011-12-02 20:22                   ` Dimitri Sivanich [this message]
2011-12-02 22:42                   ` Thomas Gleixner
2011-12-01  2:06       ` Dimitri Sivanich
2011-12-01  2:12         ` Andrew Morton
2011-12-01  2:34           ` Dimitri Sivanich
2011-12-01  2:38             ` Andrew Morton
2012-01-15 13:46 ` Mike Galbraith
2012-01-15 14:04   ` Mike Galbraith
2012-01-15 14:23   ` Mike Galbraith
2012-01-25 11:27   ` Mike Galbraith
2012-02-15 14:16 ` Thomas Gleixner
2012-02-15 14:37   ` Dimitri Sivanich
2012-02-15 14:52     ` Thomas Gleixner
2012-02-15 15:34       ` Dimitri Sivanich
2012-02-15 20:36         ` Thomas Gleixner
2012-02-16 14:59           ` Dimitri Sivanich
2013-03-19 17:03             ` [PATCH][RFC] " Jiri Bohac
  -- strict thread matches above, loose matches on Subject: below --
2011-08-17 16:07 [PATCH] " Dimitri Sivanich
2011-08-17 16:47 ` Thomas Gleixner
2011-08-23 19:56   ` Dimitri Sivanich
2011-09-02  8:19     ` Thomas Gleixner
2011-09-02 19:29       ` Dimitri Sivanich
2011-09-02 19:57         ` Thomas Gleixner
2011-09-02 20:39           ` Dimitri Sivanich
2011-08-03 19:57 Dimitri Sivanich

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